Fix build breakage encountered by Flutter

runtime/bin/bin.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'gen_source_dir': '<(SHARED_INTERMEDIATE_DIR)',
 
     'io_cc_file': '<(gen_source_dir)/io_gen.cc',
     'io_patch_cc_file': '<(gen_source_dir)/io_patch_gen.cc',
@@ skipping 119 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'log_android.cc',
         'log_linux.cc',
         'log_macos.cc',
         'log_win.cc',
       ],
+      'defines': [
+        'LEGACY_DEBUG_PROTOCOL_ENABLED',
+      ],
       'includes': [
         'builtin_impl_sources.gypi',
         '../platform/platform_sources.gypi',
       ],
       'sources/': [
         ['exclude', '_test\\.(cc|h)$'],
       ],
       'conditions': [
         ['OS=="win"', {
           'sources/' : [
@@ skipping 580 matching lines @@
         '<(builtin_cc_file)',
         '<(io_cc_file)',
         '<(io_patch_cc_file)',
       ],
       'includes': [
         'builtin_impl_sources.gypi',
         '../platform/platform_sources.gypi',
         '../vm/vm_sources.gypi',
       ],
       'defines': [
+        'LEGACY_DEBUG_PROTOCOL_ENABLED',
         'TESTING',
       ],
       # Only include _test.[cc|h] files.
       'sources/': [
         ['exclude', '\\.(cc|h)$'],
         ['include', 'run_vm_tests.cc'],
         ['include', 'builtin_nolib.cc'],
         ['include', 'builtin_natives.cc'],
         ['include', '_gen\\.cc$'],
         ['include', '_test\\.(cc|h)$'],
@@ skipping 55 matching lines @@
         }],
         ['OS=="linux"', {
           'cflags': [
             '-fPIC',
           ],
         }],
       ],
     },
   ],
 }